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Figure 4 | Geochemical Transactions

Figure 4

From: The nature and fate of natural resins in the geosphere. Part X. Structural characteristics of the macromolecular constituents of modern Dammar resin and Class II ambers

Figure 4

DEPT spectra for modern Dammar polymer. (a) DEPT 45 (all protonated carbon), (b) DEPT 90 (CH, methyl resonances may also still be observed but are greatly attenuated), (c) DEPT 135 (CH and CH3, CH2 resonances appear as negative) (* = CHCl3). See Additional file 3 for interactive NMR spectra for (a), (b) and (c).

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